Stock photography picture of Traditional half-timber framed house with PV-modules supplying the house with electrical power, Strohen, Lower Saxony, Germany.

B22X4A - Licenced Caption Traditional half-timber framed house with PV-modules supplying the house with electrical power, Strohen, Lower Saxony, Germany. Description In Germany more than 300,000 solar systems have been installed in three years and micro-generation provides nearly 12% of all the country's electricity. Householders can earn 8% to 10% returns on investing in their own home systems and in some cases pay their mortgages with the income earned.